Mystiornis is an extinct genus of bird which existed in what is now western Siberia, Russia during the early Cretaceous period (Barremian/Aptian age). It is known from an isolated metatarsus found in the Shestakovo-1 locality of southern Western Siberia. It was named by Evgeny N. Kurochkin, Nikita V. Zelenkov, Alexandr O. Averianov and Sergei V. Leshchinskiy in 2011, and the type species is Mystiornis cyrili. While most recent studies place it as an enantiornithean, specifically an avisaurid, the authors note that the placement in both groups is tentative and further material will be required
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).